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The Mail Tags available for the booking and payment tags are different for admin and client e-mails. While the mail tags that you are using in your code are correct, it looks like the tags are used in the wrong template.

Please provide us details on where have you inserted the code so that we can test the tags accordingly and provide you with some precise fix.

1. The goal is I want to add information about Trip Price and Payment Amount.. so when customers receive email booking, they will remember the trip price and how much they have to pay according to number of pax

The “Mail Tags” are the set of available tags that can be used for WP Travel Plugin in the Booking and payment emails to both admin and clients, that is dynamically replaced by the respective contents when Bookings/payments are made in your website.

As the booking and payment process are different from each other, each set of mail tags are available for booking and email are different. You can find the mail tags used in the Admin Dashboard > Trips > Settings > Email > Payment Email Templates > Client Email Template, where payment mail tags are used by default.

You can edit the email layout and content from the editor available there. For the list of available mail tags, please check the Documentation Link Here :

So may be you have placed the tag in Admin Dashboard > Trips > Settings > Email > Booking Email Templates > Client Email Template as there are notes tags as dispayed in the screenshot which is not in the client email template.

So please once verify it properly and place the tags in proper payment template.

Even doing so does not help you then we have to look into your dashboard so send your login detail in below-given email address.